Nail-extractor.



B. W. MGGULLEY." NAIL EXTRAGTOR.

APPLICATION FILED JUNE 15, 1912.

1,060,994. Patented May 6, 1913.

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1,060,994. Patented May 6, 1913.

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UNITED sTATEs PATENT onnron.

BURDETTE W. MGCULLEY, OF WOODSTON, KANSAS.

NAIL-EXTRACTOR.

To all 071cm it may concern Be it known that I, Bunnn'r'rn W. Mo-CULLEY, a citizen of the United States, residing at Woodston, in thecounty of Books and State of Kansas, have invented certain.

new and useful Improvements in Nail-Extractors, of which the followingis a specification, reference being had to the accom= panying drawings.

This invention relates to improvements in nail extractors and has forone of its objects to provide a device primarily designed for thepurpose of pulling or extracting drift pins such as are employed inrailroad bridge construction for securing the cross timbers andlongitudinal tie supporting stringers to the piles, and which may bealso used in the manner of the ordinary lifting jack.

Another object of the invention is to provide a jack for the abovepurpose including a vertically movable bar having gripping dogs mountedin one end for engagement with the pin, manually operable means formoving said bar, and additional means coacting with the operating meansto permit of the reverse movement of the bar.

A further object of the invention resides in the provision of anauxiliary dog carrying member adapted for removable connection to thebar to provide an extension whereby the drift pins which would otherwisebe inaccessible in the use of the device can be extracted. 7

Still another object of the invention is to provide a device of theabove character which consists of comparatively few parts of simpleform, which may be easily and quickly assembled and can be replaced whenunfit for further use at an insignificant expense.

With the above and other objects in view as will become apparent as thedescription proceeds, the invention consists in certain constructions,combinations and arrangement of the parts that I shall hereinafter fullydescribe and claim.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawings in which Figure 1 is aperspective view showing my improved nail extractor as applied for thepurpose of extracting drift pins from a railroad bridge; Fig. 2 is anenlarged side elevation of the nail extractor; one wall of the casingbeing removed to more clearly Specification of Letters Patent.

Application filed June 15, 1912.

Patented May 6, 1913.

Serial No. 703,906.

55 of Fig. 2; Fig. 6 is a section taken on the line 66 of Fig. 5; andFig. 7 is a detail elevation showing the auxiliary pin extracting barconnected to the lower end of the main bar.

For the purpose of illustrating one of the uses to which the device maybe adapted, I I

have shown in Fig. l'of the drawings a fragment of a railroad bridge andmy improved nail extractor arranged in operative position. It will,however, be apparent as the detail description of the construction ofthe device is better understood, that the same may also be employed asan ordinary lifting jack and for other analogous purposes.

Referring particularly to Fig. 1, P designates the supporting piles ofthe bridge structure which includes the transverse cap beams B which aresecured to the upper ends of the piles, and the longitudinal stringers Sarranged upon said cap beams and secured thereto by means of the pins Dwhich are driven through the stringers into the cap beams. Similar pinsalso secure the transverse cap beams to the piles. Upon the stringers Sthe usual spaced tie bars T are arranged to support the rails R. Itfrequently occurs in the process of alining the track rails that thedrift pins D will become bent or kinked and it is for the purpose ofextracting such distorted pins that my invention is primarily devised.

Wit-h the above end in view the present invention embcdies in itsconstruction a tubular case or housing .5 which is preferably ofrectangular form in cross section. This case is provided at its lowerend with a base plate 6 which may be integrally formed therewith orsecuredto the case in any suitable manner. Within the case 5 thevertically movable extracting or lifting bar 7 is mounted. The lower endof this bar is bifurcated as shown at 8 and in the opposed walls thereofthe gripping dogs 9 are pivotally mounted upon the pins 10 fixed in theopposite sides of recesses 10 provided in said walls to receive thedogs. The gripping dogs 9 are inclined upwardly from their pivoted endsand have their free ends provided with curved knife edges 11 forengagement with opposite sides of the cylindrical drift pin D beneaththe head thereof as more clearly shown in Fig. 7. The bar 7 isprovidedwit-h a longitudinal opening 12 which extends entirely through the same.As the drift pins are of great length, the bar 7 must be released fordownward movement through the case 5 and a new hold upon the pinobtained by means of the dogs 9 in order to complete the extraction ofthe pin. In this adjustment of the bar, the pin moves into thelongitudinal opening or bore 12 of the bar. In order to securely engagethe cutting edges of the dogs with'thepin, I provide a lever 13fulcrumed intermediate of its ends upon the lower endof the bar 7 andpivotally connected at'its inner" end to the links 14, the other ends ofsaid links being connected to the opposed dogs; It will thus be seenthat by simplyforcing the outer end of the lever 13*upwardly, the edges11 of the dogs are moved into close contact with the pin.

One of the side walls of the case 5 is provided with a longitudinalopening 15 to accommodate the laterally extending ends 16 of theplateslfi which are secured to opposite sides of the bar 7 at its lowerend. These projecting' ends of the plates are adapted to support theends of ties or beams whereby thesame may bereadily lifted into positionwhen the bar is moved in the case.

The operating means 'for the bar 7 comprises a rectangular yoke 17 theparallel arms ofwhichare disposed upon opposite sides' 'of the bar andwithin the upper end ofthe case 5. Theopposed walls of the case 5 arerecessed as shown at 18 to accommodatethe arms of the yoke. The case 5is also provided upon one of'its'w'alls with an extension 19 to receivethe intermediate portion of the yoke 17 Between the arms of the yoke andupon opposite sides of the'bar 7 the paw-ls or dogs 2Qare pivotallymounted at one oftheirendsl These dogs project upwardly, and the otherends-thereof are yieldingly heldin engagement with the oppositelongitudinalseries of rack teeth21 formed on thebar, by means ofthesprings 22; Thecase 5 is provided with an opening 23 throughwhichtheends of the yoke arms project. To thearms of the yoke a socket member24t is secured which is adapted to receivethe end of a suitableoperating handleindicated at 25; Theyoke arms are further providedintermediate of their ends with studs 26 which are-journaled in openingsprovided in the opposed walls of'the case 5.

In order to disengage the dogs or pawls 20 'from engagement withtheteeth of the bar 7, I provide the lever 27 which is fulcrumed upon oneof thearms 'of the yoke. One end of this lever extends through theopening23 in the'wall of the case 5 while the other end of said lever isprovided-with a plate 28 which is disposed over the upper edge of theyoke arm. To each of the dogs 20, one end of a heavy leaf spring 29 1ssecured,the free ends of said springs bearing upon the opposite ends ofthe plate 28. A

pin 30 is removably disposed in an opening or socket and is ac apted tosupport the lever 27.

When the lever is disposed above this pin,

the dogs 20 are held in their operative positions in engagement with therack teeth of the bar 7 by means of the springs 22. In order to movesaid dogs to their inoperarovided in one of the yoke arms 1tive'positions, the pin 30 is removed and the 20 outwardly. Thus the bar7 is free to be forced downwardly through the casing 5. In this downwardmovement of the bar, the gripping dogs 9 in the lower end thereofrelea-se their hold. When the bar is in position to be again movedupwardly in the case, the dogs 9 areagain engaged with the pin. Theoperator now oscillates the yoke 17, the dogs 20 alternatelyengaging'with the rack teeth upon opposite sides of the bar 7 and movingthe same upwardly. In

this manner the pin may be easily and quickly extracted.

WVhen the device is to be employed for the extraction of the pins whichsecure the cap beams B to the piles, it may be necessary to lengthen thepull bar 7, and to this end I provide an auxiliary bar 31, one end ofwhich is enlarged and bifurcated as shown at 32. In this bifurcated endof the auxiliary bar the dogs 9 are arranged in a similar manner to thedogs 9 previously referred to and are adapted to grip on opposite sidesof the pin in a like manner. The upper end of the bar 31 is providedwith recesses 83 in opposite faces to receive the dogs 9 in the main bar7, which serve to effectually hold themain and auxiliary bars inconnected relation. The device is now operated in the manner abovedescribed to extract the pin, the base plate (3' of the" case 5.

resting upon the adjacent tie bars T.

The upper end of the bar 7 is provided From the foregoing it is thoughtthat the construction and mannerof ope'ration'of my improved nailextractor will be clearly understood. The device may be easil andquickly placed in position and provides means whereby bent or distortedpins may be removed from bridges or other structures with a minimum ofmanual labor. The case 5 is preferably provided adjacent to its upperend and upon opposite sides with suit able handles 37 whereby the nailextractor may be conveniently moved from place to place. Owing to thecomparatively few parts employed in the construction of the device, andtheir simple form, it will be obvious that the invention is extremelystrong and durable in practical use and may be produced at comparativelysmall cost.

While I have shown and described the preferred construction andarrangement of the various elements it will be understood that theinvention is susceptible of considerable modification without departingfrom the essential features or sacrificing any of the advantagesthereof.

Having thus described the invention, what is claimed is:

1. A nail extractor of the character described, comprising a tubularcase open at both ends, a bar longitudinally movable in the case andprovided with a longitudinal opening extending therethrough, the opposedwalls of said opening being recessed near one end thereof, a grippingdog pivotally mounted at its lower end in each of said recesses andmeans for moving said bar in the case to extract a pin, the pin beingadapted to extend into the longitudinal opening of the bar to permit ofthe movement of said bar with relation to the pin.

2. A nail extractor of the character described, comprising a tubularcase open at both ends, a bar longitudinally movable in the case andprovided with a longitudinal Copies of this patent may be obtained foropening extending entirely therethrough, the opposed walls of saidopening being longitudinally recessed, a dog pivotally secured at itslower end within each of said recesses and adapted for engagement with apin to be extracted, means for moving the free .ends of said dogs intoengagement with the pin, said means comprising a lever pivotedintermediate its ends and projecting into the longitudinal opening insaid bar and link members pivotally connected to the inner ends of saidlever and to the dogs, and means for moving said bar in the case toextract the pin, the pin being adapted to extend into the longitudinalopening of the bar to permit movement of said bar with relation to thepin.

8. A nail extractor of the character described comprising an aperturedbase plate, a tubular case carried by said base plate, a hollow barlongitudinally movable in said case, dogs pivotally mounted within saidbar, a yoke journaled in the opposed walls of the case for oscillatorymovement, the case being formed with an opening through which one end ofthe yoke projects, pivoted spring pressed pawls mounted in the yoke,said bar being provided with teeth for engagement by said pawls, anangular lever fulcrumed upon the yoke and having a handle portion,spring plates carried by the pawls and engaged with one end of saidlever, and means removably mounted in the yoke to hold the lever againstmovement when the pawls are disposed in their operative or inoperativeposition.

In testimony whereof I hereunto aflix my signature inthe presence of twowitnesses.

BURDETTE WV. MOCULLEY.

WVitnesses:

MINNIE BRU'roN, SrILEs E. CHAPEL.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

